What part of Amnesia scared you the most?

[hainesftw]

Coming out of the Archives when you first encounter the Shadow, I did not expect it to attack me. I actually yelled because I thought a monster had appeared and was attacking me; when I realized how stupid I was, I just laughed.

Other than that, both parts of the Prison - but especially the frickin' North Block - had me so tensed up I could barely move for a while. Serious triumph of atmosphere.